Police say they gathered some evidence at the scene, and they are reviewing surveillance video from the area to spot the gunman, but they say they need the public’s help. A friend with Hagan during the shooting was unconscious, possibly because he had been assaulted.

“We need a description. We need a travel of flight. Did he get away on foot? On bike? Did he have an accomplice? We believe somebody saw something,” said Captain James Clark of the Philadelphia Police Department’s Homicide Division.

The $40,000 reward is being offered for information in the case — $20,000 from the City of Philadelphia and $20,000 from the Citizens Crime Commission.

Police say anyone with information should call the Philadelphia Police Department’s homicide division or the Citizens Crime Commission at 215-546-TIPS.